【摘要】 20 0 1年 10月采集南京地区 8种稗草 (Echinochloa)种子 ,分别用 0、0 .0 1、0 .10、1.0 0、10 .0 0mg/L扫特浸稗草种子 ,萌发后测定其形态、结构及α 淀粉酶活性。结果表明 ,无芒稗的株高、叶片及叶鞘细胞的长度、α 淀粉酶活性受扫特抑制的程度最低 ,旱稗、稗、西来稗次之 ,光头稗最高。说明不同稗草的种及变种间存在耐药性的差异 ,其中无芒稗的耐药性最强 ,光头稗最弱更多还原

【Abstract】 The seeds of eight species and varieties of barnyar dgrass were treated with pretilachlor. Differences in bud length, leaf cells le ngth, coleoptile cells length, and α-amylases activities of barnyardgrass aft er the herbicide treatment were found among eight species and varieties of barny ardgrass. Control percentage of the herbicide to Echinochloa crusgalli var . mitis was the lowest, and E. colonum was the highest among the tested barnyardgrass. It seemed th at the different species and varieties of barnyardgrass have various tolerance t o the pretilachlor.更多还原